Blogs

Events

Stories

Attention: RHN Hosted will reach the end of its service life on July 31, 2017.
Customers will be required to migrate existing systems to Red Hat Subscription Management prior to this date.
Learn more here

Details

The Red Hat Security Response Team has rated this update as having moderatesecurity impact. Common Vulnerability Scoring System (CVSS) base scores,which give detailed severity ratings, are available for each vulnerabilityfrom the CVE links in the References section.

A heap-based buffer overflow flaw was found in the way libtiff processedcertain TIFF images using the Pixar Log Format encoding. An attacker couldcreate a specially-crafted TIFF file that, when opened, could cause anapplication using libtiff to crash or, possibly, execute arbitrary codewith the privileges of the user running the application. (CVE-2012-4447)

A stack-based buffer overflow flaw was found in the way libtiff handledDOTRANGE tags. An attacker could use this flaw to create aspecially-crafted TIFF file that, when opened, would cause an applicationlinked against libtiff to crash or, possibly, execute arbitrary code.(CVE-2012-5581)

A heap-based buffer overflow flaw was found in the tiff2pdf tool. Anattacker could use this flaw to create a specially-crafted TIFF file thatwould cause tiff2pdf to crash or, possibly, execute arbitrary code.(CVE-2012-3401)

A missing return value check flaw, leading to a heap-based buffer overflow,was found in the ppm2tiff tool. An attacker could use this flaw to create aspecially-crafted PPM (Portable Pixel Map) file that would cause ppm2tiffto crash or, possibly, execute arbitrary code. (CVE-2012-4564)

All libtiff users should upgrade to these updated packages, which containbackported patches to resolve these issues. All running applications linkedagainst libtiff must be restarted for this update to take effect.

Solution

Before applying this update, make sure all previously-released erratarelevant to your system have been applied.